WARNING: Please check the generation - not compatible with Generation 1! Lifespan: approximately 1000 full charge cycles, without significant loss of performance Only necessary maintenance measure: clean and lubricate battery and connection poles (pole grease, technical vaseline, silicone-free) Designed for MTB, flat and compact profile, impact-resistant and vibration-proof as well as waterproof Note: Battery versions with an A at the end of the Shimano article number are no longer compatible with the old charger EC-E6000.